From other comments, it appears that this is because this is a preview, and once it goes into full release, there will be an option to opt out.
Oh yeah. They even have preview badge on the home page. I was just thinking they could have stated it little bit politely. Something sort of, if you are not comfortable sharing the logs then wait for 1.0. blah..
But who cares :-). Many are downloading and I have it too!